A person who clicks the little red thumbs-down icon on EVERY YouTube video they watch (even videos which have no perceivable reason to be "disliked" at all), purely for the sake of doing so. It's believed that most serial dislikers suffer from a form of OCD currently unknown to science. No one knows who these people are, particularly since YouTube doesn't keep any record of who dislikes what, so research cannot be undertaken.

These people don't necessarily hate the video, but will still click "dislike" just for fun, especially if said video has no dislikes at all yet. They then delight in watching the comment section fall to ruin as a direct result of their interference, with highly intellectual and imaginative responses such as "1 person is gay", or "1 person should jump off a cliff", or "Justin Bieber made a new account to dislike this video" appearing in it.

Furthermore, the less "likes" a video has, the more devastating are the actions of the serial disliker, due to YouTube's like/dislike bar being based on the proportion between likes and dislikes, rather than on actual numbers. 1 dislike shows up as a much bigger chunk of red on the bar for a video with only 3 likes, than for one with 150. In the former case, it's much more noticeable and the commenters' outrage is slightly more justified, though in the latter case, the reactionary comments take on forms not unlike "the dislike bar is the size of Justin Bieber's penis", which is inexcusable.
Someone disliked my video of a drunk guy falling into a trashcan! Must be a serial disliker.
by Jimmy91ST July 7, 2011
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to go on a particular youtube video daily and click the dislike button. you don't like the video at all, but you go there anyway for the sheer pleasure of contributing to the growth of the 'dislike bar' just because you hate it so much.
Eric: Man, I hate this song and music video!

Ed: Then why are you watching the video on youtube?

Eric: Oh I'm just here for my daily dislike.

Ed: Oh okay. What song and video is it?

Eric: Rebecca Black's Friday.
by pprkut1023 May 12, 2011
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What, Youtube dislikes? I'm sorry but what is that, all I see is a like button and a burning memory....
Youtube dislikes definition? Well you can't explain something that doesn't exist.
by BumbleBay December 9, 2021
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The act of removing a dislike from a video, picture, status update or message posted online or directly to you.
John un-disliked the picture in the hopes that Maria didn't see the thumbs down!
by Tommy Gooch January 5, 2019
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A term used to describe when a mass amount of people (or one person using multiple accounts) have down-voted a post, reply, comment, blog, video (etc) in a short amount of time, with the result most often leading to dislikes winning over likes by a landslide.
Troll: This video SUCKS! I'm going to burn your house down and violate your sisters!

Anonymous Person #'s 1-40: *clicks the dislike button*

Poster: I have never seen a comment get disliked to -40 before. It truly got dislike-bombed.
by Knowledgeable Monkey December 27, 2013
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an immediate dislike for someone or something that can't be justified or has no reason behind it.
Guy1: I don't like ________.
Guy2: Why?
Guy1: I don't know. I just don't.
Guy2: That, my confused little idiot, is irrational dislike.
by I like bagels August 4, 2011
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Me: Dislike this! Raghhhhhhhhh.....hummus!
Stranger listening: wtf
by 15-9-14-11 December 12, 2018
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